Enable optional headers to be passed into the authentication parameters

client.go

@@ -62,11 +62,18 @@ func (c *Client) V0() *client.TurnkeyAPI {
 type Authenticator struct {
 	// Key optionally overrides the globally-parsed APIKeypair with a custom key.
 	Key *apikey.Key
+
+	// Optionally add headers to each request
+	Headers map[string]string
 }
 
 // AuthenticateRequest implements runtime.ClientAuthInfoWriter.
 // It adds the X-Stamp header to the request based by generating the Stamp with the request body and API key.
 func (auth *Authenticator) AuthenticateRequest(req runtime.ClientRequest, reg strfmt.Registry) (err error) { //nolint: revive
+	for k, v := range auth.Headers {
+		req.SetHeaderParam(k, v)
+	}
+
 	stamp, err := apikey.Stamp(req.GetBody(), auth.Key)
 	if err != nil {
 		return errors.Wrap(err, "failed to generate API stamp")